Gear wheel



Jan. 14, 1930. BASTIAN 1,743,095

GEAR WHEEL Filed March 29, 1924 I 4 V 1% 6 l I -5 SN 6 WITNESSES:INVENTOR ZR A/vhur JBasf/an ATTORNEY latented Jan. '14, 1930 v UNITED,STATES PATENT OFFICE I ARTHUR J, BASHTIAN', F WILKINSBURG, PENNSYLVANIA,ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING-COMPANY, ACORPORATION OF PENNSYL- For the purpose VANIA.

GEAR WHEEL Application flledliarch 29, 1924. Serial No. 702,780.

My invention refers to molded articles and particularly to molded gearsand a method of constructing gear Wheels having metal centers andworking surfaces of molded material. i q

of obtaining strength and accuracy of alignment in a gear wheel whichhas a working surface of molded'fibrous material and a condensationproduct, it is de sirable to provide a metal web or center. The metalprovides a substantial base upon which to mold the working surface and asuitable material on which to form anchoring means for the moldedmaterial.

A cast metal center is particularly substantial and is also desirable inthat it provides a suitable structurein which to mount a suitable hub orbushing. In some instances, however, it is desirable to combine theadvantages of the cast metal center with a light weight structure, andmy invention is directed thereto.

One object of my invention is, therefore, to provide a gear blank havinga metal center which shall possess strength and resiliency and shall belight in weight.

Another object of my invention is to provide a metal center for a gearblank which may be made by an inexpensive punching operation and shallembody a rim portlon formed from, and integral with, the metal web.

Heretofore, gears made of fibrous material and a binder have been moldeddirectly on a. bushing. Such a construction is satisfactory in machineelements where the power transmitted is small and the bushing is not subjected to a torque suflicient to destroy the bond between the bushingand the molded material. Where a larger bonding surface for the moldedmaterial has been required, a metal center has been provided. Theflange, were cast in one piece and the non-metallic working portion ismolded on the flange. This construction was desirable wherever strengthand exactness were required. In certain service conditions, a largebonding surface is desirable between the molded material and the metalcenter and it is also desirable to provide an inexpensive and easllyconweb and hub' structed metal center which is light in weight.

My invention provides such a combination by making use of a single metalplate that may be punched 0r bent, in order to provide a flange on whichthe molded rim is anchored.

In the drawing constituting a part hereof and in which like charactersdesignate like parts,

Fig. 1 is a cross-sectional view of a gear wheel,

Fig. 2 is a plan view of the metal web or center portion of the wheelshowing the man.- ner of punching and forming of the rimor flangethereof, and x Fig. 3 is an elevational view of the metal web, showing aportion of the rim formed thereon.

The gear wheel comprises a central hub or bushing 1 attached to a metalweb 2 by pressing it into a flanged and knurled central portion 3 of theweb and if desired, securing it with rivets 4. Flanges 5 are formed web2 and a composite working portion 6 of fibrous material impregnated witha binder, such as a phenolic condensation product, is molded thereon.

' The flanges 5 are formed by cutting or punching radial or V-shapedslits 7 in the cir cular blank as shown in Fig. 2, thereby formin aseries of tooth-like members and then ending the alternate teeth orsections 8 and 9 in opposite directions at right angles to the planeformed present a peripheral band, as shown in Fig. 3, consisting ofalternate spaces and fiat metal portions in staggered relation. Theflanges thus provide a face or support upon in the I of the web. Thefaces of the flangesso which the impregnated material is molded and asuitable roughened surface upon which described a specific embe limitedthereto.

known manner of punched metal having metal having a rim For example,slits may be 'cut 1n the periphery of the metal disks in various ways,in order to form teeth of difl'erent shape thereon. The metal-disk'2 maybe distorted or upset-to form a flange without previously slitting thematerial, or the face of the flanged portion may be formed by bendingthe metal at any angle to the surface of the disk which is greater orless than a right angle. The hub or sleeve member may be mounted in thecenter in any well other than the one illustrated.

Other modifications will suggest themselves to those skilled inthe artwithout departing from the spirit of my invention the scope of which isdefined in the annexed claims.

I claim as my invention: 1. A gear blank comprising .a working body ofmolded material, and a web memr of punched metal having oppositelydisposed distorted portions in the periphery thereof for providing a rimof alternate spaces-and sections of metal.

2. A gear blank comprising a working body of molded material, and a webmember oppositely disposed periphery for proof alternate spacesperpendicu distorted portions in its viding a cylindrical rim andsections of metal that is theplane of said web.

3. A gear blank comprising a working body of molded material, and a webmember consisting of punched sheet metal, an upstrnck portion in thecenter of said. web member for mounting ahub therein and a spacedtransverselydistorted segments of metal on the rimportion of said webmember. 4. A gear -blank body of molded material, a web member ofpunched sheet metal, a distorted portion in the center of said webmember ,for mounting a hub therein and distorted portion's on the rlmportionof said web member, said distorted portions being arranged inamannerto provide a cylindrical rim perpendicular to the plane of saidweb of staggered sections of said metal.

5. A gear comprising a working body of molded material, a web memberconsisting of sheet metal having distorted portions in the rim portion,said distorted portions being arrangedso as to provide spaced segmentsof metal extending at an angle from said web portion.

6. A gear comprising a working body of molded material, a.web member ofsheet portion composed of-oppositely dis osed segments of metal arrangedproviding an anchoring means for said molded materiaL- gear comprising aworking surface of a molded material, a cast-metal hub and a webmemberof sheet metal having a dis-, torted rimportion and a distortedcentral ar to 4 comprising a 'working portion, the distorted rim portionof said web providing an anchoring means for said molded material and rthe central distorted portiokn providing an anchoringmeans' for said.metallic peripheral part, and an interrupted flange projectingtransversely from the outer edge and on each side of said web andsupporting the peripheral part.

A mechanical element comprising a hub, a metal web projecting from thehub and having at its jecting transversely from both sides to forminterrupted flanges, and a molded peripheral portion supported by saidflanges and interlocked with said tongues. v

In testimony whereof, I have hereunto sub: scribed my name this 20th dayof March, 1924.

' ARTHUR J. BASTIAN.

outer edge spaced tongues pro- ELL)

